Question

which of these factors may affect a persons blood alcohol concentration?
gender
race
blood type
age

Explanation:

Gender can affect blood - alcohol concentration because women generally have less body water and more body fat than men of the same weight. This means that alcohol is more concentrated in a woman's body. Race, blood type, and age (while age can have some minor effects in certain cases) do not have as significant an impact on blood - alcohol concentration as gender.

Answer:

gender